I just got curious about where weight could be saved: The Super Gravity Magic Mary is a bit of a beast, the SLX double+bash cranks are pretty solid, the CCDBair is a lot heavier than a smaller shock, and the Flow EX rims are on the burlier side for this bike. Swap them for appropriate but lighter parts and that would knock off just over a kilo. Take the pedals off for magazine weights and it's down to 12.8kg / 28.1lbs.

But it climbs better than my 26.5lb hardtail so I really can't see the point of any changes!

as for the tyres... with ra-ra or ra-ro combo maybe a couple of hundred grams more. my reasoning for fitting them was more about clearance on the seatstay when fitting 650b wheels... with the thunder burts, there is very respectable clearance and they roll as fast as a fast thing.

i have a yeti sb-66 for gnarly stuff, so can be quite xc focussed with the scalpel.

I haven't weighed the SB66 yet but it's not light. The frame is very heavy indeed even if the rest of the build isn't (pikes, arch ex/hopes, 1x10, haven carbon, reverb etc etc) BUT it does climb seem like a mountain goat, certainly better than the ASR5 which came before it, which was a disappointment against the Turner Flux that came before that.

I'm quite sure the Cannondale will romp away on the ups and the flats, but on the downs, the SB-66 magic really comes into play.

Mine is a claimed 31.8lbs / 14.4 kg's. Pretty happy with that to be fair as I haven't made any concious attempt to slim it down. My last bike was comparable to the weight of a small moon so this one feels pretty lightweight to me.

I always love the "Just Under" guestimates "its Just a sliver under 24.9lbs"... is it bollocks! its 28lbs and you know it.

My 456 was 32lbs last time I weighed it but it has since acquired a heavier fork, front wheel and gone from 2x9 to 1x10 drive and I cleaned some mud off it... I reckon its probably gained a pound and a half...

Don't know or care what my other bikes weigh, they are mostly heavier than other peoples I like to think that makes me much more manly (While giving a perfect excuse for being a bit slow on climbs)...